things i cannot do

Today's vid is a tutorial from the contact nunchaku guru - John Strange.
He's done 4 tutorials like this (which I'm sure I'll post soon). I can do the rotors and wrist-wraps (tutorials 2 and 3 - although my rotors are nowhere near as good as John's!) but these fishtails drive me mental. I just cannot get the technique down. My only consolation is that I don't think anyone else can either! John is an a league of his own on this type of tech...